I’ve never written to you before, but I really need your advice. I have suspected for some time now that my wife is cheating on me.I see the usual signals; the phone rings and when I answer, the caller hangs up. My wife has been going out with ‘the girls’ a lot lately, although when I ask for their names she says, “just some friends from work, you don’t know them.” I try to stay awake to see when she comes home, but I always fall asleep.I think deep down, I just didn’t want to know the truth.

Last night she went out again and I decided to really check on her.Around midnight, I decided to hide in the garage behind my road and mountain bikes so I could get a good view of the street when she arrived home from her night out with ‘the girls’.When she got out of the car, she was buttoning up her blouse, which was open. She took her panties out of her purse and slipped them on.It was at that very moment, crouching behind my bike, I noticed a slight crack in the downtube, two inches behind the headset.Is this something I can fix myself, or should I take it back to the bike shop?